Generate certificates for the aggregation layer.

nix/kubernetes/keys/package/k8s-ca/package.nix

@@ -10,23 +10,28 @@
 {
   stdenv,
   openssl,
+  ca_name,
+  ca_config,
   ...
 }:
 stdenv.mkDerivation (finalAttrs: {
-  name = "k8s-ca";
+  name = "k8s-ca-${ca_name}";
   nativeBuildInputs = [ openssl ];
   buildInputs = [ ];
 
   unpackPhase = "true";
 
-  installPhase = ''
-    mkdir -p "$out"
-    cd "$out"
+  buildPhase = ''
+    openssl genrsa -out "${ca_name}-ca.key" 4096
 
-    openssl genrsa -out ca.key 4096
     openssl req -x509 -new -sha512 -noenc \
-            -key ca.key -days 3653 \
-            -config ${./files/ca.conf} \
-            -out ca.crt
+            -key "${ca_name}-ca.key" -days 3653 \
+            -config "${ca_config}" \
+            -out "${ca_name}-ca.crt"
+  '';
+
+  installPhase = ''
+    mkdir "$out"
+    cp "${ca_name}-ca.crt" "${ca_name}-ca.key" $out/
   '';
 })